Some people take their Baileys straight up, some add it to their coffee, the Flat White Martini takes it a stage further. Oh boy. Once you dabbled with this recipe from Baileys, you'll be whipping out your cocktail shaker at the drop of a hat. Baileys Flat White Martinis are the sort of cocktail that curtseys at the start of a giggly lunch party and nods firmly at the end of a drinks party and oh so embraces you tightly at the meerest suggestion of a quiet night in.